Rely on the Lord forever!

1 Kings 15:16-24
There was war between Asa and Baasha king of Israel throughout their reigns.
Asa took all the silver and gold that was left in the treasuries of the Lord's temple and of his own palace. He entrusted it to his officials and sent the to Ben-Hadadsone of Hezion, the king of Aram, who was ruling in Damascus. "Let there be a treaty between me and you," he said, "See, I am sending you a gift of silver and gold. Now break your treaty with Baasha king of Israel so he will withdraw from me"
In his old age, however, his feet became diseased.
The war with Israel continues until he succeeds in persuading Syria to change sides. It costs him all the silver and gold from his palace and the Temple, but diverts Baasha's attention and buys Asa time to improve his own defence.
Why?
A king trusted to the Lord, why when he is getting old he forgot the Lord and rely on the king of Aram? When everything is good and smoothly, people may forget the mercy of the Lord, and proud it was my effort.
How?
Pray to the Lord, let my heart trust in the Lord forever no matter what age I will be. God always is my Lord!